c# 系统音量的控制

using  System; using  System.Collections.Generic; using  System.ComponentModel; using  System.Data; using  System.Drawing; using  System.Text; using  System.Windows.Forms; using  System.Diagnostics; using  System.Runtime.InteropServices;    namespace  WindowsApplication1 {    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();                    }                [DllImport("user32.dll", EntryPoint = "SendMessageA")]        public static extern int SendMessage(IntPtr handle, int wMsg, int wParam, int lParam);           private const int WM_APPCOMMAND = 0x319;        private const int APPCOMMAND_VOLUME_UP = 10;        private const int APPCOMMAND_VOLUME_DOWN = 9;        private const int APPCOMMAND_VOLUME_MUTE = 8;        private void button1_Click(object sender, EventArgs e)        {            SendMessage(Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_UP * 0x10000);                    }        private void button2_Click(object sender, EventArgs e)        {            SendMessage(Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_DOWN * 0x10000);        }        private void button3_Click(object sender, EventArgs e)        {            SendMessage(Handle, WM_APPCOMMAND, 0x200EB0, APPCOMMAND_VOLUME_MUTE * 0x10000);        }    }}

三个按钮分别为增加音量,减少音量,静音

以下代码捕捉系统消息,改变系统声音音量

protected   override   void  WndProc( ref  Message m) // 监视Windows消息         {            const int WM_APPCOMMAND = 0x319;            switch (m.Msg)            {                case WM_APPCOMMAND:                    {                        MessageBox.Show(m.ToString());                    }                break;            }                        base.WndProc(ref m); //将系统消息传递自父类的WndProc        }

转载于:https://www.cnblogs.com/zhahost/archive/2008/06/02/1212416.html

相关资源：C# 音量控制 设置系统音量——试了三种方法